void interrupt(void) {
if(INTCON.INTF)
{
if(PORTB.F1) pulse++;
else pulse--;
}
INTCON.INTF = 0; //You HAVE to clear interrupt flag
}
void main()
{
TRISA = 0xFF;
PORTA = 0x00;
TRISE = 0x00;
PORTE = 0x00;
TRISB = 0x0F;
PORTB = 0x0F;
TRISC = 0x00;
PORTC = 0x00;
TRISD = 0x00;
PORTD = 0x00...